有没有办法在pysnmp中插入snmpset事务中的延迟？

Question

总之，我对python相当陌生，但我编写脚本的方法是在不牺牲可读性的情况下尽量少使用代码行。这么说，这就是我试着用手边的剧本做的事。

我有一个脚本，它通过Pysnmp从cisco交换机获取正在运行的或启动的配置，并将其发送到TFTP服务器。这要求在交换机上设置多个OID的值。当我试图通过snmp在单个setCmd命令上设置多个OID时，如下所示：

g = setCmd(SnmpEngine(),
                   CommunityData(snmp_community),
                   UdpTransportTarget((host_ip, 161)),
                   ContextData(),
                   ObjectType(ObjectIdentity('CISCO-CONFIG-COPY-MIB', 'ccCopyProtocol', random_number), 1),
                   #ObjectType(ObjectIdentity('CISCO-CONFIG-COPY-MIB', 'ccCopySourceFileType', random_number), users_numeric_entry),
                   #ObjectType(ObjectIdentity('CISCO-CONFIG-COPY-MIB', 'ccCopyDestFileType', random_number), 1),
                   #ObjectType(ObjectIdentity('CISCO-CONFIG-COPY-MIB', 'ccCopyServerAddress', random_number), '10.10.11.100'),
                   #ObjectType(ObjectIdentity('CISCO-CONFIG-COPY-MIB', 'ccCopyFileName', random_number), destination_file),
                   #ObjectType(ObjectIdentity('CISCO-CONFIG-COPY-MIB', 'ccCopyEntryRowStatus', random_number), 1)
                   )

        next(g)

我可以在交换机上(通过调试)看到SNMP数据包被传递，但是在应用它们时必须有一个时间问题(设置OID的值)。With that being said, is there a way to insert a few millisecond delay between each setCmd command?

当单独设置每个OID的值时，我的脚本将按预期工作，并将配置复制到TFTP服务器。因此，对于我需要设置值的每个OID，我有一个setCmd，如下所示：

g = setCmd(SnmpEngine(),
                   CommunityData(snmp_community),
                   UdpTransportTarget((host_ip, 161)),
                   ContextData(),
                   ObjectType(ObjectIdentity('CISCO-CONFIG-COPY-MIB', 'ccCopySourceFileType', random_number),
                              users_numeric_entry))

        next(g)

我在一个setCmd命令中设置所有OID的问题真的是一个延迟问题吗？如果是，我可以在命令中插入延迟吗？

谢谢您抽时间见我!

从交换机中用DEBUGS更新

发送单个setCmd__时的调试：

00:19:16: SNMP: Packet received via UDP from 10.10.10.10 on Vlan1
00:19:16: SNMP: Get request, reqid 2179409, errstat 0, erridx 0
 system.5.0 = NULL TYPE/VALUE
00:19:16: SNMP: Response, reqid 2179409, errstat 0, erridx 0
 system.5.0 = Switch
00:19:16: SNMP: Packet sent via UDP to 10.10.10.10
00:19:17: SNMP: Packet received via UDP from 10.10.10.10 on Vlan1
00:19:17: SNMP: Set request, reqid 2179410, errstat 0, erridx 0
 ccCopyEntry.2.21 = 1
 ccCopyEntry.3.21 = 4
 ccCopyEntry.4.21
Switch# = 1
 ccCopyEntry.5.21 = 10.10.10.10
 ccCopyEntry.6.21 = Switch-running.txt
 ccCopyEntry.14.21 = 1
00:19:17: SNMP: Response, reqid 2179410, errstat 12, erridx 6
 ccCopyEntry.2.21 = 1
 ccCopyEntry.3.21 = 4
 ccCopyEntry.4.21 = 1
 ccCopyEntry.5.21 = 10.10.10.10
 ccCopyEntry.6.21 = Switch-running.txt
 ccCopyEntry.14.21 = 1
00:19:17: SNMP: Packet sent via UDP to 10.10.10.10

当我发送单独的setCmd命令时：

00:15:33: SNMP: Packet received via UDP from 10.10.10.10 on Vlan1
00:15:33: SNMP: Get request, reqid -1563913845, errstat 0, erridx 0
 system.5.0 = NULL TYPE/VALUE
00:15:33: SNMP: Response, reqid -1563913845, errstat 0, erridx 0
 system.5.0 = Switch
00:15:33: SNMP: Packet sent via UDP to 10.10.10.10
00:15:34: SNMP: Packet received via UDP from 10.10.10.10 on Vlan1
00:15:34: SNMP: Set request, reqid -1563913844, errstat 0, erridx 0
 ccCopyEntry.2.102 = 1
00:15:34: SNMP: Response, req
Switch#id -1563913844, errstat 0, erridx 0
 ccCopyEntry.2.102 = 1
00:15:34: SNMP: Packet sent via UDP to 10.10.10.10
00:15:34: SNMP: Packet received via UDP from 10.10.10.10 on Vlan1
00:15:34: SNMP: Set request, reqid -1563913843, errstat 0, erridx 0
 ccCopyEntry.3.102 = 3
00:15:34: SNMP: Response, reqid -1563913843, errstat 0, erridx 0
 ccCopyEntry.3.102 = 3
00:15:34: SNMP: Packet sent via UDP to 10.10.10.10
00:15:34: SNMP: Packet received via UDP from 10.10.10.10 on Vlan1
00:15:34: SNMP: Set request, reqid
Switch# -1563913842, errstat 0, erridx 0
 ccCopyEntry.4.102 = 1
00:15:34: SNMP: Response, reqid -1563913842, errstat 0, erridx 0
 ccCopyEntry.4.102 = 1
00:15:34: SNMP: Packet sent via UDP to 10.10.10.10
00:15:34: SNMP: Packet received via UDP from 10.10.10.10 on Vlan1
00:15:34: SNMP: Set request, reqid -1563913841, errstat 0, erridx 0
 ccCopyEntry.5.102 = 10.0.1.81
00:15:34: SNMP: Response, reqid -1563913841, errstat 0, erridx 0
 ccCopyEntry.5.102 = 10.0.1.81
00:15:34: SNMP: Packet sent via UDP to 10.0.
Switch#1.20
00:15:34: SNMP: Packet received via UDP from 10.10.10.10 on Vlan1
00:15:34: SNMP: Set request, reqid -1563913840, errstat 0, erridx 0
 ccCopyEntry.6.102 = Switch--start.txt
00:15:34: SNMP: Response, reqid -1563913840, errstat 0, erridx 0
 ccCopyEntry.6.102 = Switch--start.txt
00:15:34: SNMP: Packet sent via UDP to 10.10.10.10
00:15:34: SNMP: Packet received via UDP from 10.10.10.10 on Vlan1
00:15:34: SNMP: Set request, reqid -1563913839, errstat 0, erridx 0
 ccCopyEntry.14.102 =
Switch#1
00:15:34: SNMP: Response, reqid -1563913839, errstat 0, erridx 0
 ccCopyEntry.14.102 = 1
00:15:34: SNMP: Packet sent via UDP to 10.10.10.10
00:15:34: SNMP: Packet received via UDP from 10.10.10.10 on Vlan1
00:15:34: SNMP: Get request, reqid -1563913838, errstat 0, erridx 0
 ccCopyEntry.10.102 = NULL TYPE/VALUE
00:15:34: SNMP: Response, reqid -1563913838, errstat 0, erridx 0
 ccCopyEntry.10.102 = 2
00:15:34: SNMP: Packet sent via UDP to 10.10.10.10
Switch#
00:15:37: SNMP: Packet received via UDP from 10.10.10.10 on Vlan1
00:15:37: SNMP: Set request, reqid -1563913837, errstat 0, erridx 0
 ccCopyEntry.14.102 = 6
00:15:37: SNMP: Response, reqid -1563913837, errstat 0, erridx 0
 ccCopyEntry.14.102 = 6
00:15:37: SNMP: Packet sent via UDP to 10.10.10.10

Answer 1

该条目遵循RowStatus语义，详见https://www.rfc-editor.org/rfc/rfc2579

在我看来，您需要将ccCopyEntryRowStatus设置为createAndGo，而不是active。

Answer 2

我不认为在cisco交换机中可以让SNMP代理单独处理带有延迟的SNMP变量。你(作为一个用户)需要处理时间的问题看起来也很可疑.

所以我可能会试图理解为什么开关不喜欢你的管理命令，有什么正确的方法来管理它.灵感的一个可能来源是MIB中的描述，其中定义了您要处理的变量。